"It's one of those where we have a duty of how we manage him over the season, because his target should be to play 35, 45 games in the league and cup.

"If he does that at 19 years-old that's great for him moving forward."

The striker was rested for the Checkatrade Trophy victory over Carlisle before the international break due to this injury, and was then uncharacteristically quiet during the 2-0 win at Shrewsbury Town.

And while acknowledging that his performance was not his best, the Sunderland boss believes that the display was merely an off-day and that the striker will continue to contribute as the season progresses.

"His performance on Saturday dipped below the levels he is showing," he admitted.